Depends on what you mean by "observer", but I'd guess you want "watchers". In the "people" area of an issue, there is a "watchers" list - clicking on that will take you to a screen where you can add people to that list (or remove them from it)
You will need to make sure you have "manage watchers" permission in the project.
Atlassian Summit is an excellent opportunity for in-person support, training, and networking.Learn more
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG